Dubawa
Cellulose polymer na halitta ne wanda ya ƙunshi raka'a β-glucose mai anhydrous, kuma yana da ƙungiyoyin hydroxyl guda uku akan kowane zoben tushe.Ta hanyar gyare-gyaren sinadarai na cellulose, ana iya samar da nau'o'in nau'in cellulose, kuma ɗaya daga cikinsu shine ether cellulose.Cellulose ether wani fili ne na polymer tare da tsarin ether wanda aka samo daga cellulose, ciki har da methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, da sauransu.Ana samar da waɗannan abubuwan da suka samo asali ta hanyar mayar da martani ga alkali cellulose tare da monochloroalkane, ethylene oxide, propylene oxide, ko monochloroacetic acid.Sakamakon ether na cellulose yana da kyakkyawar solubility na ruwa, ƙarfin daɗaɗɗa, da kayan aikin fim, kuma ana amfani dashi sosai a masana'antu kamar gine-gine, magunguna, abinci, da kayan shafawa.Cellulose ether abu ne mai sabuntawa, mai yuwuwa, kuma abu mara guba, yana mai da shi sanannen madadin polymers na roba.
Ayyuka da Features
1. Siffofin bayyanar
Cellulose ether fari ne, mara wari, foda mai fibrous wanda ke ɗaukar danshi cikin sauƙi kuma ya samar da barga, ɗanɗano, colloid mai haske idan an narkar da shi cikin ruwa.
2. Samuwar Fina-Finan da Mannewa
Gyaran sinadarai na cellulose don samar da ether cellulose yana tasiri sosai ga kaddarorinsa, ciki har da solubility, ikon samar da fim, ƙarfin haɗin gwiwa, da juriya na gishiri.Wadannan halaye suna sa ether cellulose ya zama polymer mai kyawawa tare da kyakkyawan ƙarfin injiniya, sassauci, juriya na zafi, da juriya na sanyi.Bugu da ƙari, yana nuna dacewa mai kyau tare da resins daban-daban da masu yin filastik, yana mai da shi dacewa don amfani da shi wajen samar da robobi, fina-finai, varnishes, adhesives, latex, da kayan shafa na magani.Saboda abubuwan da ya dace da su, ether cellulose ya zama wani abu mai mahimmanci a cikin masana'antun masana'antu, yana samar da ingantaccen aiki, kwanciyar hankali, da dorewa ga samfurori masu yawa.A sakamakon haka, yana da fa'idodi da yawa na aikace-aikace a fannoni daban-daban, gami da magunguna, sutura, masaku, gine-gine, masana'antar abinci, da sauransu.
3. Solubility
Solubility na cellulose ethers kamar methylcellulose, methyl hydroxyethyl cellulose, hydroxyethyl cellulose, da sodium carboxymethyl hydroxyethyl cellulose bambanta dangane da zafin jiki da sauran ƙarfi amfani.Methylcellulose da methyl hydroxyethyl cellulose suna narkewa a cikin ruwan sanyi da wasu kaushi na halitta amma suna hazo lokacin da zafi, tare da methylcellulose hazo a 45-60 ° C da gauraye etherified methyl hydroxyethyl cellulose a 65-80 ° C.Koyaya, hazo na iya sake narkewa lokacin da aka saukar da zafin jiki.A daya hannun, hydroxyethyl cellulose da sodium carboxymethyl hydroxyethyl cellulose ne ruwa-soluble a kowane zafin jiki amma insoluble a Organic kaushi.Wadannan ethers cellulose suna da daban-daban solubility da hazo Properties cewa sa su dace da daban-daban aikace-aikace a cikin masana'antu kamar robobi, fina-finai, coatings, da kuma adhesives.
4. Kauri
Lokacin da ether cellulose ya narke a cikin ruwa, yana samar da maganin colloidal wanda danko ya rinjayi digiri na polymerization na ether cellulose.Maganin yana ƙunshe da macromolecules masu ruwa waɗanda ke nuna halayen da ba Newtonian ba, watau, halin kwarara yana canzawa tare da ƙarfi da ake amfani da shi.Saboda tsarin macromolecular, danko na bayani yana ƙaruwa da sauri tare da maida hankali, amma yana raguwa da sauri tare da karuwar zafin jiki.Matsakaicin matakan ether na cellulose kuma yana rinjayar pH, ƙarfin ionic, da kasancewar sauran sinadarai.Waɗannan kaddarorin na musamman na ether cellulose suna sa ya zama mai amfani a aikace-aikace daban-daban kamar su adhesives, sutura, kayan kwalliya, da samfuran abinci.
Aikace-aikace
1. Masana'antar Man Fetur
Sodium carboxymethyl cellulose (NaCMC) ne cellulose ether tare da fadi da kewayon aikace-aikace a cikin man hakar tsari.Kyakkyawar ɗanko-ƙara da asarar ruwa na rage kaddarorin sun sa ya zama sanannen zaɓi a cikin hako ruwa, ruwan siminti, da tsage ruwa.Musamman ma, ya nuna kyakkyawan sakamako na inganta farfadowar mai.NaCMC na iya tsayayya da gurɓataccen gishiri mai narkewa daban-daban da haɓaka dawo da mai ta hanyar rage asarar ruwa, da juriyarsa na gishiri da ƙarfin haɓakawa ya sa ya dace don shirya ruwan hakowa don ruwa mai daɗi, ruwan teku, da cikakken ruwan gishiri.
Sodium carboxymethyl hydroxypropyl cellulose (NaCMHPC) da sodium carboxymethyl hydroxyethyl cellulose (NaCMHEC) ne guda biyu cellulose ether abubuwan da aka samu tare da high slurrying kudi, mai kyau anti-calcium yi, da kuma mai kyau danko-kara iyawa, yin su da kyau kwarai zabi a matsayin hakowa laka magani jamiái da kuma kayan for. shirya ruwan gamawa.Suna nuna babban danko-ƙara iyawa da rage asarar ruwa idan aka kwatanta da hydroxyethyl cellulose, da ikon da za a iya ƙirƙira su cikin hakowar ruwa na nau'ikan yawa a ƙarƙashin nauyin calcium chloride yana sa su zama ƙari mai yawa don haɓaka samar da mai.
Hydroxyethyl cellulose (HEC) wani sinadari ne na cellulose da ake amfani dashi azaman mai kauri da ƙarfafawa a cikin hakowa, kammalawa, da aikin siminti.Idan aka kwatanta da sodium carboxymethyl cellulose da guar danko, HEC yana da karfi yashi dakatar, high gishiri iya aiki, mai kyau zafi juriya, low hadawa juriya, ƙasa da ruwa asarar, da gel karya block.An yi amfani da HEC da yawa saboda tasirin sa mai kyau, ƙananan ragowar, da sauran kaddarorin.Gabaɗaya, ethers cellulose kamar NaCMC, NaCMHPC, NaCMHEC, da HEC suna taka muhimmiyar rawa a cikin aikin hako mai kuma sun nuna babban tasiri wajen inganta dawo da mai.
2. Masana'antar Gine-gine da Paint
Sodium carboxymethyl cellulose abu ne mai haɗaɗɗun kayan gini wanda za'a iya amfani dashi azaman retarder, wakili mai riƙe ruwa, mai kauri da ɗaure don ginin masonry da plastering turmi.Hakanan za'a iya amfani dashi azaman mai watsawa, wakili mai riƙe ruwa da kauri don filasta, turmi da kayan daidaita ƙasa.Masonry na musamman da plastering admixture da aka yi da carboxymethyl cellulose na iya inganta aikin aiki, riƙe ruwa da juriya, guje wa fashewa da ɓarna a bangon toshewa.Bugu da ƙari, ana iya amfani da methyl cellulose don yin kayan ado na gine-gine masu dacewa da muhalli don bango mai daraja da fale-falen dutse, da kuma kayan ado na ginshiƙai da abubuwan tunawa.
3. Masana'antar Sinadaran Kullum
Sodium carboxymethyl cellulose ne m stabilizing viscosifier da za a iya amfani da da dama kayayyakin.A cikin samfuran manna da ke ɗauke da ƙaƙƙarfan albarkatun foda, yana taka muhimmiyar rawa wajen tarwatsawa da daidaitawar dakatarwa.Domin ruwa ko emulsion kayan shafawa, shi ayyuka a matsayin thickening, dispersing, da homogenizing wakili.Wannan abin da aka samu na cellulose kuma zai iya aiki a matsayin mai daidaitawa na emulsion, man shafawa da mai kauri da shamfu da stabilizer, manne manne da man goge baki, da mai kauri da kuma maganin tabo.Sodium carboxymethyl hydroxypropyl cellulose, wani nau'i na cellulose ether, ana amfani da ko'ina a matsayin man goge baki stabilizer saboda thixotropic Properties, wanda taimaka wajen kula da man goge baki formability da daidaito.Wannan abin da aka samo shi ma yana da juriya ga gishiri da acid, yana mai da shi ingantaccen kauri a cikin abubuwan wanke-wanke da abubuwan hana tabo.Sodium carboxymethyl cellulose ana amfani da shi azaman mai tarwatsa datti, mai kauri, da tarwatsawa a cikin samar da foda na wanki da kayan wanka na ruwa.
4. Magunguna da Masana'antar Abinci
A cikin masana'antar harhada magunguna, Yibang hydroxypropyl carboxymethylcellulose (HPMC) ana amfani dashi ko'ina azaman kayan haɓakar ƙwayoyi don sakin maganin maganin baka da ci gaba da shirye-shiryen saki.Yana aiki azaman kayan sakewa don daidaita sakin kwayoyi, kuma azaman abin rufewa don jinkirta sakin abubuwan da aka tsara.Methyl carboxymethyl cellulose da ethyl carboxymethyl cellulose ana yawan amfani da su don yin allunan da capsules, ko don suturta allunan masu rufin sukari.A cikin masana'antar abinci, ƙimar darajar cellulose ethers suna da tasiri masu kauri, masu daidaitawa, abubuwan haɓakawa, wakilai masu riƙe ruwa da jami'an kumfa na inji a cikin abinci daban-daban.Methylcellulose da hydroxypropylmethylcellulose ana la'akari da su na rashin kuzari kuma suna da lafiya don amfani.Carboxymethylcellulose mai tsabta za a iya ƙarawa zuwa kayan abinci, ciki har da madara da kirim, condiments, jams, jelly, abincin gwangwani, syrup tebur, da abubuwan sha.Bugu da ƙari, ana iya amfani da carboxymethyl cellulose a cikin jigilar kayayyaki da adana sabbin 'ya'yan itatuwa a matsayin filastik kunsa, yana ba da sakamako mai kyau na kiyayewa, ƙarancin ƙazanta, rashin lalacewa, da samar da injina cikin sauƙi.
5. Kayan aiki na gani da lantarki
The high-tsarki cellulose ether tare da mai kyau acid da gishiri juriya abubuwa a matsayin electrolyte thickening stabilizer, samar da barga colloidal Properties ga alkaline da zinc-manganese baturi.Wasu ethers cellulose suna nuna crystallinity na ruwa mai zafi, irin su hydroxypropyl cellulose acetate, wanda ke samar da lu'ulu'u na ruwa na cholesteric ƙasa 164 ° C.
Babban Magana
● Kamus na Abubuwan Sinadarai.
● Halaye, shirye-shirye da aikace-aikacen masana'antu na ether cellulose.
● Matsayin Matsayi da Ci gaban Kasuwancin Cellulose Ether Market.
